Harrow.



N0. 853,523. PATBNTED MAY 14', 1907.

'S. B. STARK.

HARROW.

APPLICATION-$113151) HAB- 22, 190B.

filllll 519M140); v I

PATENTED MAY 14, 1907.

s. .B. STARK.

HARROW.

uruuumn FILED 1.53.22, 190a.

2 skins-gum 2.

win wows ms NORRIS FFTERS 60-. wasnmarou. n. c.

UNITED STATES PATENT OFFICE.

HARHOW.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed March 22,1906. Serial No. 307,547-

To all whom, it ncay concern.-

Be it known that I, SUMMERFIELD B. STARK, a citizen. of the UnitedStates, resid ing at Newsite, in the county of Tallapoosa, State ofAlabama, have invented certain new and useful Improvements in I-larrowsand. I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled'in theart to which it appertains to make and use the same.

This invention relates to cultivators and has for its object to providean implement of this character which will be efficient in action andwhich may be used to chop corn stalks when so desired.

With the above and other objects in view, the invention consists in theconstruction and arrangement of parts, shown in the accompanyingdrawings, in which:

Figure 1 is a side elevation of theinvention. Fig. 2 is a top plan viewthereof. Fig. 3 is a rear view, and, Fig. 4 is a detail view of one ofthe choppers and its associated parts.

Referring to the drawings, the numeral 5 denotes the axle of theimplement and 6 the ground Wheel supporting the same. Secured at itsrear end to the axle 5 is a tongue 7. Pivotally mounted upon the axle 5is a frame including side bars 9 and cross-bars 10 and 11, the bar 10connecting the forward ends of the side bars and the bar 11 connectingthe said side bars intermediate their ends.

Extending upwardly from the rear end of the tongue 7 is a seat standard12 upon the upper end of which is mounted a seat 13 and secured to theside of the tongue 7 is a segmental rack 14. Pivoted to the tongue inposition to co-operate with the segmental rack 14 is a foot lever whichis substantially in the form of a bell crank lever and connecting onearm of the bell crank lever and the bar 11 of the frame, is a link 15,it being understood that movement of the foot lever will vary the pitchof the frame.

Mounted in the rear ends of the side members 9 is a crank shaft 16provided at one of its ends with a sprocket gear 17 A standard 18extends upwardly from the axle 5 and mounted in a bearing at the upperend of the standard 18 is a shaft 19 which extends upon opposite sidesof the said bearing and upon which are mounted sprocket gears 20 and 21.Connecting the sprocket gears 17 and 20 is a sprocket chain 22 andconnecting the sprocket gear 21 and a sprocket gear 23 loosely mountedon the axle 5 is a chain 24. The hub of the sprocket gear 23 is in theform of a sleeve 25 having an annular groove 26 and a clutch face 27.Pivoted to the axle 5 is a lever 27 to the lower end of which is pivotedone end. of a rod 28 which is provided at its opposite end with a yokemember engaged in the groove in the sleeve 25. Pivoted to the up per endof the lever 27 at one of its ends and at the other of its ends to thelower end of a lever 29 is a rod 30 whereby the lever 27 may be rockedto move the sprocket 23 along the axle 5. The lever 29 is held in itsadjusted position by means of a segmental rack 31. The hub of the groundwheel 6 adjacent the sprocket 23 is provided with a clutch face 32 forengagement with the clutch face on the sleeve 25, it being understoodthat the crank shaft is by this means rotated.

Mounted upon each of the crank portions of the'crank shaft 16 is anannularly grooved anti-friction roller 33 and engaged in the groove ofeach roller is the looped end of a rod 34 u on the lower end of which isa cultivator blade 35. Rigidly connected at their forward ends to thebar 11 of the frame are guide rods 36'which are in alinement with therods 34 and which are bent laterally and thence rearwardly at theirmiddle as at 37 to allow for free movement of the crank shaft. Guidesleeves 33 are carried at the rear ends of the rods 36 for oscillatorymovement with respect thereto and through the said guide sleeves 33 areengaged the rods 34. Disposed upon the rods 34 intermediate the lades 35and the sleeves 38 are springs 39 which cushion the movement of the rods34 during their reciprocatory movement.

What is claimed is 1. An implement of the class described congirising aframe arranged for travel, a cra shaft j ournaled in the frame, meansfor rotating the crank shaft, rods pivotally connected with the crankshaft, blades carried by the rods, a fixed shaft mounted in the frameand forwardly of the rock shaft, arms secured at their rear ends to thefixed shaft, said arms being extended rearwardly and being offsetadjacent the rods carrying the blades, guide sleeves engaged upon therods and connected with the rear ends of the arms for oscillatorymovement with respect thereto, and a spring disposed upon the rodsintermediate the said sleeve and the said blades.

2. An implement of the class described s rings disposed upon the rodsand interme- IO com rising a frame arranged for travel, a iate the saidsleeves and the said blades.

eran shaft journaled in the frame, means for In testimony whereof, Iaffix my signature rotating the ei'lank shaft, hrods 1glivotally 00nd inpresence of two Witnesses.

neeted with t e crank s aft, ades cards '1 1 by the rods, fixed armscarried by the frame, SUMMERI IELD STARK guide sleeves carried by thearms for o'seilla- Witnesses:

tory movement, said sleeves being arranged J. I.'DONEGAN,"-

to slidably reeeive the first named rods, and J. WILSON NOLEN.

